Spin and torsion in the very early universe

Details Spin and torsion in the very early universe Spin and torsion in the very early universe

Sep 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983phya..121..541b&link_type=abstract

Physica A, Volume 121, Issue 3, p. 541-551.

Physics

9

Scientific paper

In the very early universe with temperature T between 1024 K and 1032 K the gravitational effect of torsion is dominant if particles with spin are sufficiently polarized. The source of the torsion is the spin density and the latter is usually described by a classical theory of Weyssenhoff and Raabe. In this article the spinning particles are described quantum mechanically, i.e. with a Dirac field and the spin density is defined as the source of the torsion. The macroscopic average of the spin density is obtained by the relativistic Wigner function formalism. The expression of the spin density, as derived in this article, is different from the classical one, except when both are zero.

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